Responsively App
Responsively App is an open-source desktop application designed to streamline responsive web development. It provides a modified browser environment where developers can preview a website across multiple simulated device viewports simultaneously, such as phones, tablets, and desktops. The tool offers synchronized interactions, so actions like scrolling, clicking, or navigating are mirrored across all devices in real time, reducing the need for manual repeated testing. Built with web technologies and available for Windows, macOS, and Linux, Responsively App includes features like custom device profiles, screenshot capture, and an integrated device inspector. It is actively maintained on GitHub and distributed free of charge under an open-source license. The application is aimed at web developers, UI/UX designers, and anyone who needs to ensure a consistent user experience across different screen sizes.
- Category
- Dev Tools
- Pricing
- Open Source
Problem solved
Testing a website's responsive design typically requires resizing browser windows or using separate device emulators, which is time-consuming and error-prone. Responsively App solves this by showing many device frames at once and mirroring user interactions, letting developers quickly identify layout issues across breakpoints without switching between tools.
Use cases
- Previewing a web page on iPhone, Android, tablet, and desktop simultaneously
- Debugging CSS layout issues across multiple breakpoints
- Testing touch interactions and scroll behavior on different device profiles
- Capturing screenshots for client presentations or design reviews
- Inspecting DOM and CSS in each device viewport independently
- Creating custom device profiles for uncommon screen sizes
Audience
- Developers
- Designers
- Hobbyists
Pros
- Free and open source
- Real-time interaction mirroring across devices
- Support for custom device presets
- Cross-platform (Windows, macOS, Linux)
- Active community and regular updates
Cons
- May consume significant system resources with many device views
- Not a full replacement for real-device testing
- Electron-based app can feel heavy compared to browser dev tools
- Limited to web content; no native mobile emulation
Official website: https://github.com/responsively-org/responsively-app
Canonical LambdaBase page: https://www.lambdabase.com/tools/responsively-app